70 lines
5.2 KiB
HTML
70 lines
5.2 KiB
HTML
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<!DOCTYPE html
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<meta name="DC.Type" content="concept" />
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<meta name="DC.Title" content="Use the force-end-of-data operation" />
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<meta name="abstract" content="The force-end-of-data (FEOD) operation allows you to force all changes that were made to a file by your program to auxiliary storage. It also allows you to position the read operation to either the beginning or the end of a file if the file is open for input operations." />
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<meta name="DC.subject" content="Force-End-Of-Data (FEOD) operation, FEOD (Force-End-Of-Data) operation" />
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<meta name="copyright" content="(C) Copyright IBM Corporation 1998, 2006" />
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<title>Use the force-end-of-data operation </title>
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</head>
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<body id="rbafofeodop"><a name="rbafofeodop"><!-- --></a>
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<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
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<h1 class="topictitle1">Use the force-end-of-data operation </h1>
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<div><p>The force-end-of-data (FEOD) operation allows you
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to force all changes that were made to a file by your program to auxiliary
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storage. It also allows you to position the read operation to either the beginning
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or the end of a file if the file is open for input operations.</p>
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<p>Normally, the system determines when to force changes to auxiliary storage.
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However, you can use the FEOD operation to ensure that all changes are forced
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to auxiliary storage.</p>
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<p>*START sets the beginning or starting position in the database file member
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currently open to just before the first record in the member (the first sequential
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read operation reads the first record in the current member). If MBR(*ALL)
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processing is in effect for the Override with Database File (OVRDBF) command,
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a read previous operation gets the last record in the previous member. If
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a read previous operation is done and the previous member does not exist,
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the end of file message (CPF5001) is sent. *END sets the position in the database
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file member currently open to just after the last record in the member (a
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read previous operation reads the last record in the current member). If MBR(*ALL)
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processing is in effect for the OVRDBF command, a read next operation gets
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the first record in the next member. If a read next operation is done and
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the next member does not exist, the end of file message (CPF5001) occurs.</p>
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<p>If the file has a delete trigger, the force-end-of-data operation is not
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allowed. If the file is part of a referential parent relationship, the FEOD
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operation is not allowed. </p>
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<p>See your high-level language topic collection for more information about
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the FEOD operation (some high-level languages do not support the FEOD operation).</p>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="rbafoandbr.htm" title="The write operation allows you to add a new record to a physical database file member.">Add database records</a></div>
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</div>
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<div class="relconcepts"><strong>Related concepts</strong><br />
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<div><a href="rbaforzahftra.htm" title="A trigger is a set of actions that run automatically when a specified change or read operation is performed on a specified database file. On iSeries, you define a set of trigger actions in any supported high-level language.">Trigger automatic events in your database</a></div>
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<div><a href="rbaforzahfrca.htm" title="These topics discuss how to use referential constraints in your database to ensure that it contains only valid data.">Ensure data integrity with referential constraints</a></div>
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</div>
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</div>
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</body>
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